Malting-kiln.



PATENTED JUNB 9, 1908.

. J. lP. DORNPBLD MALTING KILN APPLICATION FILED .TUNE 15, 1906.

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No. 890,031. PATENTED JUNE 9, 1908. J. P. DORNFELD. MALTING KILN.

APPLICATION FILED JUNE I5. 1906.

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JOHN F. DORNFELD, OF CHICAGO, ILLINOIS.

MALTING-KILN.

Specification of Letters Patent.

Patented June 9, 1908.

Application led June 15, 1906. SerialNo. 321,876.

T o all whom it may concern:

Be it known that I, Jol-IN F. DOENEELD, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Malting-Kilns, of which the following is a specification.

Malting kilns as heretofore constructed comprise buildings of considerable height, in the upper part of which are arranged the malting floor or floors, and in the lower part are introduced the hot gases and. products of combustion from a furnace, together with a quantity of fresh air. No means is provided for mixing the hot and the cold air to produce a uniform temperature throughout the kiln and asa consequence the hot air rises in columns through the cooler surrounding air reaching the top of the kiln and there escaping through the ventilator at a temperature considerably in 4excess of the cool fresh air remaining in the bottom ofthe kiln.

One of the objects ofv this invention is to obviate the difficulty mentioned by mixing by mechanical means, the hot air and gases with cool fresh air, making a uniform mixltulre and introducing said mixture into the Further objects of the invention are to reduce the height of the kiln building, which reduction is rendered possible by locating the furnace outside of the kiln proper, and in other ways to improve the construction of such kiln.

In the accompanying drawings, Figure 1 is a transverse vertical sectional view through a malt kiln embodying the features of my invention. Fig. 2 is a longitudinal vertical sectional view through the malt kiln. Fig. 3 is a transverse view through the air mixing fan and Fig. 4. is a fragmental longitudinal section al view through one of the conveyers.

In the construction of a malt kiln embodying my said invention, I provide a kiln house comprising side walls 1 and end walls 2. This house has any suitable foundation as 3 a roof 4, and a ventilator 5. In the lower part of the kiln are arranged a mixing fan 6, hoppers 7, and two conveyer troughs 8, and above said fan and hoppers are located one or more dumping floors 9 of any suitable construction. The hoppers 7 are rectangular in horizontal is dumped when said malt is dried.

section and in the present embodiment are eight in number. Their outer edges are in contact withand secured to the side walls 1 of the kiln and their inner sides are continued upwardly in an angular apron 10 of any suitable material, which apron extends throughout the length of the kiln. The angular apron 10 is provided with a number of openings 1 1 in the present instance six in number which openings are closed by light sheet iron doors or shutters 12, pivotally connected at their upper edges by hinges 13 with the apron 10 in such manner that said shutters close upon the upper side of said apron and are there adapted to shut the openings 11. A weight 14 slidably mounted upon a rod 15 fixed to but offset from the underside of said shutters and adjustably secured upon said rod by means of a set screw lprovides a means for increasing or diminishing the resistance offered by said shutters to air pressure below them tending to open them, The angular apron 10 is provided with a bottom or floor 17 extending the entire length of said apron and said kiln excepting at a point above the fan casing to be hereinafter described, forming a longitudinal distributing flue or chamber 18 for the heated air.

The conveyer troughs 8 are located upon opposite sides of the kiln below the restricted lower ends of the hoppers 7 with which they communicate, and in each of said troughs is 'rotatably'mounted a screw conveyer 19 of ordinary construction. The screw conveyors 19 are rotated in the troughs 8 in any desirable and well known manner to'pass malt from the hoppers through the troughs 8 to any desired point of delivery. The hoppers 7 and the angular apron 10 form a surface upon which the malt from the malting floors The inclination of the apron is sufficient to permit the malt falling thereon to slide into the hoppers, the closures 12 at their upper hinged edges forming a tight joint in orderto prevent malt fromA falling through the openings 11.

A fan casing 20 having side walls 21, end walls 22 and a curved bottom wall 23 is supported within the lower part of the kiln immediately below the bottom 17 of the apron 10 and as before stated opens into the air flue 18 formed within the angle of said apron; Each of the side walls of the fan casing is provided with an inlet opening 24 for the admission of air, l both hot and cold, to be mixed b y the fan and forced into the air flue or chamber 18. Pipes 25, one at each side of the fan casing 20, communicate with a heating apparatus (not shown) of any suitable construction by means of which heated air and gases are supplied to said pipes and fan. Cool air is admitted to that portion of the building beneath the walls of the hoppers through air openings 26 in the end walls 2 of the kiln and this cool air is introduced into the fan through that portion of the air openings 241 in the side walls of the fan casing that is not filled by the hot air pipes 25, also through the inner tub es 27 extending through the curved upper ends of said hot air flues and communicating between the cool air in the lower part of the building and said fan.

A shaft 28 rotatably supported in bearings 29 andextending through the fan casing 20 carries within said casing a fan 6 of ordinary construction. The fan shaft 28 extends throughthe cool air tubes 27, which tubes are intended to protect the shaft and the fan thereon from the direct heat of the hot air within the pipes 25. Near one of its ends said shaft carries a fixed drive pulley 31 which latter provides a means for rotating the shaft 28 and the fan 80. Columns 82 are provided for partially supporting the beams 83 which carry one of the malting iioors of the kiln.

In the operation of this malting kiln7 hot air is supplied to the hot air pipes 25 and power to rotate the fan at a fair rate of speed is provided. The hot air is drawn from the heating apparatus into the fan casing and the rotation of the fan also draws cool air from the cold air chamber in the lower part of the building into the fan casing through the openings 24 in the opposite sides thereof. The rotation of the fan mixes the hot air and the cool air evenly together and discharges it upward into the distrubuting flue or chamber 18 beneath the angular apron 10.. By reason of the rotation of the lfan air is discharged into said distributing flue or chamber 18 under some pressure, said pressure being suflicient to raise the closures 12, permitting the escape of said heated mixture into the lower part of the kiln below the lower malting floor. The pressure within the flue 18 is regulated by means of the adjustable weights 111. Greater pressure within the flue 18 is obtained by moving the weights toward the free ends of their closures and less pressure by moving the weights toward the pivoted ends of the closures. AIn similar' manner more or less air may be delivered through one closure or a part of them a ..1iallll1mwmamimna.. n

than through the others should it be desirable to deliver more of the heated mixture to one portion of thekiln than to another portion thereof.

From. the foregoing it is eliar any of the common forms of fan or apparatus may be employed in my improved kiln and that the furnace for heating air may be placed within the walls of the kiln instead of in a separate building. lt also is obvious that the kiln structure may be built in other and dil ferei it forms, that the hoppers may be differently located that the form of the angular apron herein shown and the closures thereon may be altered without departing from the spirit and scope of my invention.

For the various reasons mentioned fl, desire to have it understood. that fl do not wish to limit myself hereby to the particular forni and details of the present embodiment of my said invention, but on the contrary wish to claim my said invention broadly.

I claim as my invention:

1. A kiln house having a iirst floor 5 .means located centrally of said first iloor for passing heated air through the building 5 inalt hoppers on said first floor at opposite sides of said means; and a dumping floor constituting the second floor of the kiln.

2. A kiln house having a 'first floor 5 a mixing fan upon said floor and located. centrally thereof; means for supplying air to said fan 1 a distributing flue extending longitudinally of the building above said fan 5 hoppers on said first floor at opposite sides of said fan and below said distributing llue 5 and a dumping floor constituting the second floor of the house.

8. A kiln house having two rows of ,hoppers therein, Said hoppers havii'ig inclined sides; a gable housing extending longitudinally and centrally within said building and forming a continuation of the inclined sides of said hoppers, said gable housing providing a longitudinal central distributing .llue 5 a fan located between said rows of hoppers and communicating with said distributing llue; and a dumping floor above said gable honsi i i Ll. A kiln house having a first floor; two rows of hoppers on said first floor, said hoppers having inclined sides5 a gable housing extend' '1g longitudinally and centrally within said building and forming a eontiiniation of the inclined sides of said hop'pers, said gable housing providing a longitudinal eentral distributing flue 5 a fan located on said first licor between said rows of hoppers and communicating with said distributing ilue; and a dumping floor above said gable housing and constituting the second floor of the house. y

5. A kiln house having a gable housing therein extending loi'igitudinally and eenw l Si ll l (l l Vl 5 Yl fl (l the inner side of said closure and adjustable toward and away from the upper end of the closure.

JOHN F. DORNFELD.

trally Within the house and providing a longitudinal central distributing flue; air supplyng means connected With said distributing lue, said gable housing having openings l in its opposite sides a closure for each of said Witnesses:

openings pivoted at its upper end to said L. L. MILLER, gable housing; and a Weight mounted upon l M. M. DALEY. 

